TY  - RPRT
TI  - Developing case definitions for symptom-based conditions: the problem of specificity.
AU  - K C Hyams
PY  - 1998
DO  - 10.1093/oxfordjournals.epirev.a017977
UR  - https://pubmed.ncbi.nlm.nih.gov/9919435/
ID  - 9919435
ER  -